Figure 3 (LEFT).
Photograph showing trace makers sole markings cast in sandstone
(i.e., convex hypichnia) which we suggest reflect a pre-event
trace fossil association (see text). The top layers of the semi-lithified
clays were eroded away as the turbidity current passed across
it. Sands subsequently filled the traces, resulting in sole casts
along the bottom of each sandstone layer.
Figure 4 (RIGHT).
Photograph showing a difference in trace maker size between the
layers of sandstone. Note the base of an upper sandstone layer
contains traces produced from a larger trace maker (perhaps due
to greater oxygenation or shallower water depth). Sandstone units
above this layer return to the smaller trace makers found beneath
Figure 5 LEFT.
Closeup of the larger trace maker sole casts.